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https://github.com/grumpycoders/pcsx-redux.git
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07e972b731
The first parameter of four parameter method generateRotationMatrix33 expects a pointer to a Matrix33. When a 0 is passed, it is interpreted as a null pointer that is later dereferenced to set the matrix and that causes an error.
197 lines
8.1 KiB
C++
197 lines
8.1 KiB
C++
{{=<% %>=}}#include "psyqo/application.hh"
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#include "psyqo/fixed-point.hh"
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#include "psyqo/fragments.hh"
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#include "psyqo/gpu.hh"
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#include "psyqo/gte-kernels.hh"
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#include "psyqo/gte-registers.hh"
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#include "psyqo/primitives/common.hh"
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#include "psyqo/primitives/quads.hh"
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#include "psyqo/scene.hh"
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#include "psyqo/soft-math.hh"
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#include "psyqo/trigonometry.hh"
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#include "psyqo/vector.hh"
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using namespace psyqo::fixed_point_literals;
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using namespace psyqo::trig_literals;
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static constexpr unsigned NUM_CUBE_VERTICES = 8;
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static constexpr unsigned NUM_CUBE_FACES = 6;
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static constexpr unsigned ORDERING_TABLE_SIZE = 240;
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typedef struct {
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uint8_t vertices[4];
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psyqo::Color color;
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} Face;
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static constexpr psyqo::Matrix33 identity = {{
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{1.0_fp, 0.0_fp, 0.0_fp},
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{0.0_fp, 1.0_fp, 0.0_fp},
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{0.0_fp, 0.0_fp, 1.0_fp},
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}};
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class Cube final : public psyqo::Application {
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void prepare() override;
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void createScene() override;
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public:
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psyqo::Trig<> m_trig;
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};
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class CubeScene final : public psyqo::Scene {
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void start(StartReason reason) override;
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void frame() override;
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psyqo::Angle m_rot = 0;
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// We need to create 2 OrderingTable objects since we can't reuse a single one for both
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// framebuffers, as the previous one may not finish transfering in time.
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psyqo::OrderingTable<ORDERING_TABLE_SIZE> m_ots[2];
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// Since we're using an ordering table, we need to sort fill commands as well,
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// otherwise they'll draw over our beautiful cube.
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psyqo::Fragments::SimpleFragment<psyqo::Prim::FastFill> m_clear[2];
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eastl::array<psyqo::Fragments::SimpleFragment<psyqo::Prim::Quad>, 6> m_quads;
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static constexpr psyqo::Color c_bg = {.r = 63, .g = 63, .b = 63};
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static constexpr psyqo::Vec3 c_cubeVertices[NUM_CUBE_VERTICES] = {
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{.x = -0.05, .y = -0.05, .z = -0.05}, {.x = 0.05, .y = -0.05, .z = -0.05}, {.x = -0.05, .y = 0.05, .z = -0.05},
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{.x = 0.05, .y = 0.05, .z = -0.05}, {.x = -0.05, .y = -0.05, .z = 0.05}, {.x = 0.05, .y = -0.05, .z = 0.05},
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{.x = -0.05, .y = 0.05, .z = 0.05}, {.x = 0.05, .y = 0.05, .z = 0.05}};
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static constexpr Face c_cubeFaces[NUM_CUBE_FACES] = {
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{.vertices = {0, 1, 2, 3}, .color = {0, 0, 255}}, {.vertices = {6, 7, 4, 5}, .color = {0, 255, 0}},
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{.vertices = {4, 5, 0, 1}, .color = {0, 255, 255}}, {.vertices = {7, 6, 3, 2}, .color = {255, 0, 0}},
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{.vertices = {6, 4, 2, 0}, .color = {255, 0, 255}}, {.vertices = {5, 7, 1, 3}, .color = {255, 255, 0}}};
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};
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static Cube cube;
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static CubeScene cubeScene;
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void Cube::prepare() {
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psyqo::GPU::Configuration config;
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config.set(psyqo::GPU::Resolution::W320)
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.set(psyqo::GPU::VideoMode::AUTO)
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.set(psyqo::GPU::ColorMode::C15BITS)
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.set(psyqo::GPU::Interlace::PROGRESSIVE);
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gpu().initialize(config);
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}
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void Cube::createScene() { pushScene(&cubeScene); }
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void CubeScene::start(StartReason reason) {
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// Clear the translation registers
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psyqo::GTE::clear<psyqo::GTE::Register::TRX, psyqo::GTE::Unsafe>();
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psyqo::GTE::clear<psyqo::GTE::Register::TRY, psyqo::GTE::Unsafe>();
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psyqo::GTE::clear<psyqo::GTE::Register::TRZ, psyqo::GTE::Unsafe>();
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// Set the screen offset in the GTE. (this is half the X and Y resolutions as standard)
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psyqo::GTE::write<psyqo::GTE::Register::OFX, psyqo::GTE::Unsafe>(psyqo::FixedPoint<16>(160.0).raw());
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psyqo::GTE::write<psyqo::GTE::Register::OFY, psyqo::GTE::Unsafe>(psyqo::FixedPoint<16>(120.0).raw());
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// Write the projection plane distance.
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psyqo::GTE::write<psyqo::GTE::Register::H, psyqo::GTE::Unsafe>(120);
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// Set the scaling for Z averaging.
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psyqo::GTE::write<psyqo::GTE::Register::ZSF3, psyqo::GTE::Unsafe>(ORDERING_TABLE_SIZE / 3);
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psyqo::GTE::write<psyqo::GTE::Register::ZSF4, psyqo::GTE::Unsafe>(ORDERING_TABLE_SIZE / 4);
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}
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void CubeScene::frame() {
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eastl::array<psyqo::Vertex, 4> projected;
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// Get which frame we're currently drawing
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int parity = gpu().getParity();
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// Get our current ordering table and fill command
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auto& ot = m_ots[parity];
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auto& clear = m_clear[parity];
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// Chain the fill command accordingly to clear the buffer
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gpu().getNextClear(clear.primitive, c_bg);
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gpu().chain(clear);
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// We want the cube to appear slightly further away, so we translate it by 512 on the Z-axis.
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psyqo::GTE::write<psyqo::GTE::Register::TRZ, psyqo::GTE::Unsafe>(512);
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// Here we're setting up the rotation for the spinning cube
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// First, generate a rotation matrix for the X-axis and Y-axis
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auto transform = psyqo::SoftMath::generateRotationMatrix33(m_rot, psyqo::SoftMath::Axis::X, cube.m_trig);
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auto rot = psyqo::SoftMath::generateRotationMatrix33(m_rot, psyqo::SoftMath::Axis::Y, cube.m_trig);
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// Multiply the X and Y rotation matrices together
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psyqo::SoftMath::multiplyMatrix33(transform, rot, &transform);
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// Generate a Z-axis rotation matrix (Empty, but it's here for your use)
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psyqo::SoftMath::generateRotationMatrix33(&rot, 0, psyqo::SoftMath::Axis::Z, cube.m_trig);
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// Apply the combined rotation and write it to the pseudo register for the cube's rotation
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psyqo::SoftMath::multiplyMatrix33(transform, rot, &transform);
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psyqo::GTE::writeUnsafe<psyqo::GTE::PseudoRegister::Rotation>(transform);
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int faceNum = 0;
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for (auto face : c_cubeFaces) {
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// We load the first 3 vertices into the GTE. We can't do all 4 at once because the GTE
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// handles only 3 at a time...
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psyqo::GTE::writeUnsafe<psyqo::GTE::PseudoRegister::V0>(c_cubeVertices[face.vertices[0]]);
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psyqo::GTE::writeUnsafe<psyqo::GTE::PseudoRegister::V1>(c_cubeVertices[face.vertices[1]]);
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psyqo::GTE::writeUnsafe<psyqo::GTE::PseudoRegister::V2>(c_cubeVertices[face.vertices[2]]);
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// We perform rtpt (Perspective transformation) to the three verticies.
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psyqo::GTE::Kernels::rtpt();
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// Nclip determines the winding of the vertices, used to check which direction the face is pointing.
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// Clockwise winding means the face is oriented towards us.
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psyqo::GTE::Kernels::nclip();
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// Read the result of nclip and skip rendering this face if it's not facing us
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int32_t mac0 = 0;
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psyqo::GTE::read<psyqo::GTE::Register::MAC0>(reinterpret_cast<uint32_t *>(&mac0));
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if (mac0 <= 0) continue;
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// Since the GTE can only handle 3 vertices at a time, we need to store our first vertex
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// so we can write our last one.
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psyqo::GTE::read<psyqo::GTE::Register::SXY0>(&projected[0].packed);
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// Write the last vertex
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psyqo::GTE::writeSafe<psyqo::GTE::PseudoRegister::V0>(c_cubeVertices[face.vertices[3]]);
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// Perform rtps (Perspective transformation) to the last vertice (rtpS - single, rtpT - triple).
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psyqo::GTE::Kernels::rtps();
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// Calculate the average Z for the z-Index to be put in the ordering table
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psyqo::GTE::Kernels::avsz4();
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int32_t zIndex = 0;
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psyqo::GTE::read<psyqo::GTE::Register::OTZ>(reinterpret_cast<uint32_t *>(&zIndex));
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// If the Z-index is out of bounds for our ordering table, we skip rendering this face.
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if (zIndex < 0 || zIndex >= ORDERING_TABLE_SIZE) continue;
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// Read the 3 remaining vertices from the GTE
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psyqo::GTE::read<psyqo::GTE::Register::SXY0>(&projected[1].packed);
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psyqo::GTE::read<psyqo::GTE::Register::SXY1>(&projected[2].packed);
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psyqo::GTE::read<psyqo::GTE::Register::SXY2>(&projected[3].packed);
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// Take a Quad fragment from our array, set its vertices, color and make it opaque
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auto& quad = m_quads[faceNum];
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quad.primitive.setPointA(projected[0]);
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quad.primitive.setPointB(projected[1]);
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quad.primitive.setPointC(projected[2]);
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quad.primitive.setPointD(projected[3]);
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quad.primitive.setColor(face.color);
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quad.primitive.setOpaque();
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// Insert the Quad fragment into the ordering table at the calculated Z-index.
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ot.insert(quad, zIndex);
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faceNum++;
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}
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// Send the entire ordering table as a DMA chain to the GPU.
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gpu().chain(ot);
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m_rot += 0.005_pi;
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}
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int main() { return cube.run(); }
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