example: add clipping_textured
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example/clipping_textured.cpp
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334
example/clipping_textured.cpp
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@ -0,0 +1,334 @@
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#include <cstdint>
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#include <bit>
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#include "align.hpp"
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#include "vga.hpp"
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#include "holly/holly.hpp"
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#include "holly/core.hpp"
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#include "holly/core_bits.hpp"
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#include "holly/ta_fifo_polygon_converter.hpp"
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#include "holly/ta_parameter.hpp"
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#include "holly/ta_vertex_parameter.hpp"
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#include "holly/ta_global_parameter.hpp"
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#include "holly/ta_bits.hpp"
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#include "holly/isp_tsp.hpp"
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#include "holly/region_array.hpp"
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#include "holly/background.hpp"
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#include "holly/texture_memory_alloc.hpp"
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#include "memorymap.hpp"
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#include "sh7091/serial.hpp"
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#include "geometry/triangle.hpp"
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#include "geometry/circle.hpp"
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#include "math/vec4.hpp"
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#include "math/math.hpp"
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#include "math/geometry.hpp"
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#include "maple/maple.hpp"
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#include "maple/maple_impl.hpp"
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#include "maple/maple_bus_bits.hpp"
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#include "maple/maple_bus_commands.hpp"
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#include "maple/maple_bus_ft0.hpp"
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#include "twiddle.hpp"
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#include "macaw.hpp"
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uint32_t _command_buf[1024 / 4 + 32];
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uint32_t _receive_buf[1024 / 4 + 32];
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static ft0::data_transfer::data_format data[4];
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void do_get_condition(uint32_t * command_buf,
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uint32_t * receive_buf)
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{
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using command_type = get_condition;
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using response_type = data_transfer<ft0::data_transfer::data_format>;
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get_condition::data_fields data_fields = {
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.function_type = std::byteswap(function_type::controller)
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};
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maple::init_host_command_all_ports<command_type, response_type>(command_buf, receive_buf,
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data_fields);
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maple::dma_start(command_buf);
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using command_response_type = struct maple::command_response<response_type::data_fields>;
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for (uint8_t port = 0; port < 4; port++) {
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auto response = reinterpret_cast<command_response_type *>(receive_buf);
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auto& bus_data = response[port].bus_data;
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if (bus_data.command_code != response_type::command_code) {
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return;
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}
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auto& data_fields = bus_data.data_fields;
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if ((data_fields.function_type & std::byteswap(function_type::controller)) == 0) {
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return;
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}
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data[port].analog_axis_1 = data_fields.data.analog_axis_1;
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data[port].analog_axis_2 = data_fields.data.analog_axis_2;
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data[port].analog_axis_3 = data_fields.data.analog_axis_3;
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data[port].analog_axis_4 = data_fields.data.analog_axis_4;
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}
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}
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constexpr vec3 colors[] = {
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{1.f, 0.5f, 0.f},
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{0.f, 1.0f, 0.f},
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{0.f, 0.5f, 1.f},
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{1.f, 0.0f, 1.f},
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};
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void transform1(ta_parameter_writer& parameter,
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const vec3& v,
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const vec2& uv,
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bool end_of_strip)
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{
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float x = v.x;
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float y = v.y;
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float z = v.z;
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// camera transform
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z += 1;
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// screen space transform
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x *= 240.f;
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y *= 240.f;
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x += 320.f;
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y += 240.f;
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z = 1 / z;
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constexpr uint32_t color = 0xffffffff;
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parameter.append<ta_vertex_parameter::polygon_type_3>() =
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ta_vertex_parameter::polygon_type_3(polygon_vertex_parameter_control_word(end_of_strip),
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x, y, z,
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uv.u, uv.v,
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color,
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0 // offset_color
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);
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}
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void transform(ta_parameter_writer& parameter,
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const vec3 * vertices,
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const vec2 * texture,
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const face_vtn& face,
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const vec4& color,
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const vec3& position,
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const float theta,
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const bool enable_clipping
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)
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{
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const uint32_t parameter_control_word = para_control::para_type::polygon_or_modifier_volume
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| para_control::list_type::opaque
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| obj_control::col_type::packed_color
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| obj_control::texture;
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const uint32_t isp_tsp_instruction_word = isp_tsp_instruction_word::depth_compare_mode::greater
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| isp_tsp_instruction_word::culling_mode::no_culling;
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const uint32_t tsp_instruction_word = tsp_instruction_word::src_alpha_instr::one
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| tsp_instruction_word::dst_alpha_instr::zero
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| tsp_instruction_word::fog_control::no_fog
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| tsp_instruction_word::texture_u_size::from_int(128)
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| tsp_instruction_word::texture_v_size::from_int(128);
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const uint32_t texture_address = (offsetof (struct texture_memory_alloc, texture));
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const uint32_t texture_control_word = texture_control_word::pixel_format::_565
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| texture_control_word::scan_order::twiddled
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| texture_control_word::texture_address(texture_address / 8);
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constexpr uint32_t strip_length = 3;
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vec3 points[strip_length];
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vec2 points_uv[strip_length];
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// object transform and clip
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for (uint32_t i = 0; i < strip_length; i++) {
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uint32_t vertex_ix = face[i].vertex;
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auto vertex = vertices[vertex_ix];
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vertex = (vertex * 0.5f);
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// rotate 90° around the X axis
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//float x = vertex.x;
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//float y = vertex.z;
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//float z = vertex.y;
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float x = vertex.x * cos(theta) - vertex.z * sin(theta);
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float y = vertex.x * sin(theta) + vertex.z * cos(theta);
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float z = vertex.y;
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// object transform
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x += position.x; // object space
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y += position.y; // object space
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z += position.z; // object space
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// clip
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points[i] = vec3(x, y, z);
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points_uv[i] = texture[face[i].texture];
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}
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const vec3 plane_point = {0.f, 0.f, 0.f};
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const vec3 plane_normal = {-1.f, 0.f, 0.f};
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vec3 output[4];
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vec2 output_uv[4];
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int output_length = geometry::clip_polygon_uv<3>(output,
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output_uv,
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plane_point,
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plane_normal,
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points,
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points_uv);
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if (output_length >= 3) {
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parameter.append<ta_global_parameter::polygon_type_0>() =
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ta_global_parameter::polygon_type_0(parameter_control_word,
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isp_tsp_instruction_word,
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tsp_instruction_word,
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texture_control_word,
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0, // data_size_for_sort_dma
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0 // next_address_for_sort_dma
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);
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transform1(parameter, output[0], output_uv[0], false);
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transform1(parameter, output[1], output_uv[1], false);
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transform1(parameter, output[2], output_uv[2], true);
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}
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if (output_length >= 4) {
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parameter.append<ta_global_parameter::polygon_type_0>() =
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ta_global_parameter::polygon_type_0(parameter_control_word,
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isp_tsp_instruction_word,
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tsp_instruction_word,
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texture_control_word,
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0, // data_size_for_sort_dma
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0 // next_address_for_sort_dma
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);
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transform1(parameter, output[0], output_uv[0], false);
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transform1(parameter, output[2], output_uv[2], false);
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transform1(parameter, output[3], output_uv[3], true);
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}
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/*
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A B
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D C
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*/
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}
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void init_texture_memory(const struct opb_size& opb_size)
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{
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auto mem = reinterpret_cast<volatile texture_memory_alloc *>(texture_memory32);
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background_parameter(mem->background, 0xff220000);
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region_array2(mem->region_array,
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(offsetof (struct texture_memory_alloc, object_list)),
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640 / 32, // width
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480 / 32, // height
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opb_size
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);
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}
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void init_macaw_texture()
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{
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auto src = reinterpret_cast<const uint8_t *>(&_binary_macaw_data_start);
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auto size = reinterpret_cast<const uint32_t>(&_binary_macaw_data_size);
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auto mem = reinterpret_cast<volatile texture_memory_alloc *>(texture_memory64);
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uint16_t temp[size / 3];
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for (uint32_t px = 0; px < size / 3; px++) {
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uint8_t r = src[px * 3 + 0];
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uint8_t g = src[px * 3 + 1];
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uint8_t b = src[px * 3 + 2];
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uint16_t rgb565 = ((r / 8) << 11) | ((g / 4) << 5) | ((b / 8) << 0);
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temp[px] = rgb565;
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}
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twiddle::texture(mem->texture, temp, 128, 128);
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}
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uint32_t _ta_parameter_buf[((32 * 8192) + 32) / 4];
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void main()
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{
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uint32_t * command_buf = align_32byte(_command_buf);
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uint32_t * receive_buf = align_32byte(_receive_buf);
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vga();
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init_macaw_texture();
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// The address of `ta_parameter_buf` must be a multiple of 32 bytes.
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// This is mandatory for ch2-dma to the ta fifo polygon converter.
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uint32_t * ta_parameter_buf = align_32byte(_ta_parameter_buf);
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constexpr uint32_t ta_alloc = ta_alloc_ctrl::pt_opb::no_list
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| ta_alloc_ctrl::tm_opb::no_list
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| ta_alloc_ctrl::t_opb::no_list
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| ta_alloc_ctrl::om_opb::no_list
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| ta_alloc_ctrl::o_opb::_16x4byte;
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constexpr struct opb_size opb_size = { .opaque = 16 * 4
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, .opaque_modifier = 0
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, .translucent = 0
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, .translucent_modifier = 0
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, .punch_through = 0
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};
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holly.SOFTRESET = softreset::pipeline_soft_reset
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| softreset::ta_soft_reset;
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holly.SOFTRESET = 0;
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core_init();
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init_texture_memory(opb_size);
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uint32_t frame_ix = 0;
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constexpr uint32_t num_frames = 1;
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float theta = 0;
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float x_pos = 0;
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float y_pos = 0;
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while (1) {
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do_get_condition(command_buf, receive_buf);
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ta_polygon_converter_init(opb_size.total(),
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ta_alloc,
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640 / 32,
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480 / 32);
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const float l_ = static_cast<float>(data[0].analog_axis_1) * (1.f / 255.f);
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const float r_ = static_cast<float>(data[0].analog_axis_2) * (1.f / 255.f);
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const float t_ = ((l_ > r_) ? l_ : -r_) * 3.14f / 2.f;
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if (t_ > theta) theta += (0.04f * ((t_ - theta) * (t_ - theta)));
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else theta -= (0.04f * ((t_ - theta) * (t_ - theta)));
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const float x_ = static_cast<float>(data[0].analog_axis_3 - 0x80) / 127.f;
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const float y_ = static_cast<float>(data[0].analog_axis_4 - 0x80) / 127.f;
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if (x_ > x_pos) x_pos += (0.02f * ((x_ - x_pos) * (x_ - x_pos)));
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else x_pos -= (0.02f * ((x_ - x_pos) * (x_ - x_pos)));
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if (y_ > y_pos) y_pos += (0.02f * ((y_ - y_pos) * (y_ - y_pos)));
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else y_pos -= (0.02f * ((y_ - y_pos) * (y_ - y_pos)));
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auto parameter = ta_parameter_writer(ta_parameter_buf);
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for (uint32_t i = 0; i < circle::num_faces; i++) {
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transform(parameter,
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circle::vertices,
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circle::texture,
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circle::faces[i],
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{1.0f, 1.0f, 0.0f, 0.0f}, // color
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{x_pos * 2, y_pos * 2, 0.0f}, // position
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theta,
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true // clipping
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);
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}
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parameter.append<ta_global_parameter::end_of_list>() = ta_global_parameter::end_of_list(para_control::para_type::end_of_list);
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ta_polygon_converter_transfer(ta_parameter_buf, parameter.offset);
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ta_wait_opaque_list();
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core_start_render(frame_ix, num_frames);
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v_sync_in();
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core_wait_end_of_render_video(frame_ix, num_frames);
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frame_ix += 1;
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}
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}
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@ -225,6 +225,21 @@ CLIPPING2_OBJ = \
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example/clipping2.elf: LDSCRIPT = $(LIB)/alt.lds
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example/clipping2.elf: $(START_OBJ) $(CLIPPING2_OBJ)
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CLIPPING_TEXTURED_OBJ = \
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example/clipping_textured.o \
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vga.o \
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holly/core.o \
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holly/region_array.o \
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holly/background.o \
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holly/ta_fifo_polygon_converter.o \
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maple/maple.o \
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sh7091/serial.o \
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macaw.data.o \
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$(LIBGCC)
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example/clipping_textured.elf: LDSCRIPT = $(LIB)/alt.lds
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example/clipping_textured.elf: $(START_OBJ) $(CLIPPING_TEXTURED_OBJ)
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MAPLE_DEVICE_REQUEST_OBJ = \
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example/maple_device_request.o \
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vga.o \
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@ -119,12 +119,8 @@ void init_texture_memory(const struct opb_size& opb_size)
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);
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}
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uint32_t _ta_parameter_buf[((32 * (strip_length + 2)) + 32) / 4];
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void main()
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void init_macaw_texture()
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{
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vga();
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auto src = reinterpret_cast<const uint8_t *>(&_binary_macaw_data_start);
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auto size = reinterpret_cast<const uint32_t>(&_binary_macaw_data_size);
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auto mem = reinterpret_cast<volatile texture_memory_alloc *>(texture_memory64);
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@ -139,6 +135,14 @@ void main()
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temp[px] = rgb565;
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}
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twiddle::texture(mem->texture, temp, 128, 128);
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}
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uint32_t _ta_parameter_buf[((32 * (strip_length + 2)) + 32) / 4];
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void main()
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{
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vga();
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init_macaw_texture();
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// The address of `ta_parameter_buf` must be a multiple of 32 bytes.
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// This is mandatory for ch2-dma to the ta fifo polygon converter.
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@ -5,6 +5,22 @@
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namespace geometry {
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template <int L, typename T>
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constexpr inline
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T line_plane_intersection_d(const vec<L, T>& plane_point, // p0
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const vec<L, T>& plane_normal, // n
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const vec<L, T>& line_start, // l0
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const vec<L, T>& line_vector // l
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)
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{
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const T intersection = // d
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dot(plane_point - line_start, plane_normal)
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/ dot(line_vector, plane_normal);
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return intersection;
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}
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template <int L, typename T>
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constexpr inline
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vec<L, T> line_plane_intersection(const vec<L, T>& plane_point, // p0
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const vec<L, T>& plane_normal, // n
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const vec<L, T>& line_start, // l0
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@ -13,13 +29,36 @@ vec<L, T> line_plane_intersection(const vec<L, T>& plane_point, // p0
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{
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const auto line_vector = line_end - line_start; // l
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const T intersection = // d
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dot(plane_point - line_start, plane_normal)
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/ dot(line_vector, plane_normal);
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const T intersection = line_plane_intersection_d(plane_point, plane_normal, line_start, line_vector); // d
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return line_start + line_vector * intersection;
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}
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template <int L, typename T, int M>
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constexpr inline
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std::tuple<vec<L, T>, vec<M, T>> line_plane_intersection_two_lines(const vec<L, T>& plane_point, // p0
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const vec<L, T>& plane_normal, // n
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const vec<L, T>& line_start, // l0
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const vec<L, T>& line_end,
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const vec<M, T>& line2_start,
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const vec<M, T>& line2_end
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)
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{
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/* it is assumed that line and line2 are the same line, but in different
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coordinates spaces. It is therefore possible to re-use the same
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interpolation value on either line vector.
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*/
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const auto line_vector = line_end - line_start; // l
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const auto line2_vector = line2_end - line2_start;
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const T intersection = line_plane_intersection_d(plane_point, plane_normal, line_start, line_vector); // d
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return { line_start + line_vector * intersection
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, line2_start + line2_vector * intersection
|
||||
};
|
||||
}
|
||||
|
||||
template <int L, typename T>
|
||||
T clip_boundary(const vec<L, T>& plane_point, // X
|
||||
const vec<L, T>& plane_normal, // Nc
|
||||
@ -59,7 +98,7 @@ inline int clip_polygon1(vec<L, T> * output,
|
||||
case 0b01: // I, F
|
||||
length = 2;
|
||||
{
|
||||
auto i = line_plane_intersection<L, T>(plane_point, plane_normal, s, f);
|
||||
const auto i = line_plane_intersection<L, T>(plane_point, plane_normal, s, f);
|
||||
*output++ = i;
|
||||
*output++ = f;
|
||||
}
|
||||
@ -67,7 +106,7 @@ inline int clip_polygon1(vec<L, T> * output,
|
||||
case 0b10: // I
|
||||
length = 1;
|
||||
{
|
||||
auto i = line_plane_intersection<L, T>(plane_point, plane_normal, s, f);
|
||||
const auto i = line_plane_intersection<L, T>(plane_point, plane_normal, s, f);
|
||||
*output++ = i;
|
||||
}
|
||||
break;
|
||||
@ -116,4 +155,104 @@ int clip_polygon(vec<L, T> * output,
|
||||
this_inside);
|
||||
}
|
||||
|
||||
template <int polygon_len, int L, typename T, int M>
|
||||
inline int clip_polygon1_uv(vec<L, T> * output,
|
||||
vec<M, T> * output_uv,
|
||||
const vec<L, T> plane_point,
|
||||
const vec<L, T> plane_normal,
|
||||
const vec<L, T> * polygon,
|
||||
const vec<M, T> * polygon_uv,
|
||||
const int ix_s,
|
||||
const int ix_f,
|
||||
const bool last_inside)
|
||||
{
|
||||
const vec<L, T>& s = polygon[ix_s];
|
||||
const vec<L, T>& f = polygon[ix_f];
|
||||
|
||||
const vec<M, T>& s_uv = polygon_uv[ix_s];
|
||||
const vec<M, T>& f_uv = polygon_uv[ix_f];
|
||||
|
||||
bool this_inside = 0.f < clip_boundary<L, T>(plane_point,
|
||||
plane_normal,
|
||||
f);
|
||||
|
||||
int length = 0;
|
||||
switch ((last_inside << 1) | (this_inside << 0)) {
|
||||
case 0b00: // no output
|
||||
length = 0;
|
||||
break;
|
||||
case 0b01: // I, F
|
||||
length = 2;
|
||||
{
|
||||
auto [i, i_uv] = line_plane_intersection_two_lines<L, T, M>(plane_point, plane_normal,
|
||||
s, f,
|
||||
s_uv, f_uv);
|
||||
*output++ = i;
|
||||
*output_uv++ = i_uv;
|
||||
*output++ = f;
|
||||
*output_uv++ = f_uv;
|
||||
}
|
||||
break;
|
||||
case 0b10: // I
|
||||
length = 1;
|
||||
{
|
||||
auto [i, i_uv] = line_plane_intersection_two_lines<L, T, M>(plane_point, plane_normal,
|
||||
s, f,
|
||||
s_uv, f_uv);
|
||||
*output++ = i;
|
||||
*output_uv++ = i_uv;
|
||||
}
|
||||
break;
|
||||
case 0b11: // F
|
||||
length = 1;
|
||||
*output++ = f;
|
||||
*output_uv++ = f_uv;
|
||||
break;
|
||||
}
|
||||
|
||||
bool end_of_polygon = ix_f == (polygon_len - 1);
|
||||
if (!end_of_polygon) {
|
||||
return length +
|
||||
clip_polygon1_uv<polygon_len, L, T, M>(output,
|
||||
output_uv,
|
||||
plane_point,
|
||||
plane_normal,
|
||||
polygon,
|
||||
polygon_uv,
|
||||
ix_f,
|
||||
ix_f + 1,
|
||||
this_inside);
|
||||
} else {
|
||||
return length;
|
||||
}
|
||||
}
|
||||
|
||||
template <int polygon_len, int L, typename T, int M>
|
||||
int clip_polygon_uv(vec<L, T> * output,
|
||||
vec<M, T> * output_uv,
|
||||
const vec<L, T>& plane_point,
|
||||
const vec<L, T>& plane_normal,
|
||||
const vec<L, T> * polygon,
|
||||
const vec<M, T> * polygon_uv
|
||||
)
|
||||
{
|
||||
const vec<L, T> f = polygon[polygon_len - 1];
|
||||
|
||||
// It would be nice to remove the extra dot product, but the
|
||||
// alternative seems likely uglier.
|
||||
bool this_inside = 0.f < clip_boundary<L, T>(plane_point,
|
||||
plane_normal,
|
||||
f);
|
||||
|
||||
return clip_polygon1_uv<polygon_len, L, T, M>(output,
|
||||
output_uv,
|
||||
plane_point,
|
||||
plane_normal,
|
||||
polygon,
|
||||
polygon_uv,
|
||||
polygon_len - 1, // ix_s
|
||||
0, // ix_f
|
||||
this_inside);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user