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add world texture to GL2.0 renderer

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headshot2017 2023-01-25 23:15:22 -04:00
parent c1031ad6c6
commit 7b8563f6ce
1 changed files with 59 additions and 2 deletions
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61
test/gl20/gl20_renderer.c
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@ -7,12 +7,18 @@
#include "../context.h"
#include "../level.h"
GLuint worldTexture;
uint8_t *worldTextureRaw;
int worldTextureSize[2] = {256, 256};
float *worldUv;
static void load_collision_mesh( CollisionMesh *mesh )
{
mesh->num_vertices = 3 * surfaces_count;
mesh->position = malloc( sizeof( float ) * surfaces_count * 9 );
mesh->normal = malloc( sizeof( float ) * surfaces_count * 9 );
mesh->color = malloc( sizeof( float ) * surfaces_count * 9 );
worldUv = malloc(sizeof(float) * surfaces_count * 6);
mesh->index = malloc( sizeof( uint16_t ) * surfaces_count * 3 );
for( size_t i = 0; i < surfaces_count; ++i )
@ -54,6 +60,23 @@ static void load_collision_mesh( CollisionMesh *mesh )
mesh->index[3*i+1] = 3*i+1;
mesh->index[3*i+2] = 3*i+2;
}
for( size_t i = 0; i < surfaces_count/2; i++ )
{
worldUv[12*i+0] = 0.f;
worldUv[12*i+1] = 0.f;
worldUv[12*i+2] = 4.f;
worldUv[12*i+3] = 0.f;
worldUv[12*i+4] = 0.f;
worldUv[12*i+5] = 4.f;
worldUv[12*i+6] = 0.f;
worldUv[12*i+7] = 4.f;
worldUv[12*i+8] = 4.f;
worldUv[12*i+9] = 0.f;
worldUv[12*i+10] = 0.f;
worldUv[12*i+11] = 0.f;
}
}
static void load_mario_mesh( MarioMesh *mesh, struct SM64MarioGeometryBuffers *marioGeo )
@ -104,6 +127,33 @@ static void gl20_init(RenderState *renderState, uint8_t *marioTexture)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, SM64_TEXTURE_WIDTH, SM64_TEXTURE_HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE, marioTexture);
// make a custom world texture programatically
worldTextureRaw = (uint8_t*)malloc(worldTextureSize[0] * worldTextureSize[1] * 4);
memset(worldTextureRaw, 255, worldTextureSize[0] * worldTextureSize[1] * 4);
for (int y=0; y<worldTextureSize[1]/2; y++)
{
for (int x = worldTextureSize[1]/2 - (y+1); x<worldTextureSize[1]/2 + (y+1); x++)
{
int i1 = y * worldTextureSize[0] + x;
int i2 = (worldTextureSize[1]-1-y) * worldTextureSize[0] + x;
worldTextureRaw[i1*4+0] = 192;
worldTextureRaw[i1*4+1] = 192;
worldTextureRaw[i1*4+2] = 192;
worldTextureRaw[i2*4+0] = 192;
worldTextureRaw[i2*4+1] = 192;
worldTextureRaw[i2*4+2] = 192;
}
}
glGenTextures(1, &worldTexture );
glBindTexture(GL_TEXTURE_2D, worldTexture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, worldTextureSize[0], worldTextureSize[1], 0, GL_RGBA, GL_UNSIGNED_BYTE, worldTextureRaw);
}
static void gl20_draw(RenderState *renderState, const vec3 camPos, const struct SM64MarioState *marioState, struct SM64MarioGeometryBuffers *marioGeo)
@ -120,16 +170,23 @@ static void gl20_draw(RenderState *renderState, const vec3 camPos, const struct
glMatrixMode(GL_MODELVIEW);
glLoadMatrixf((GLfloat*)view);
glEnable(GL_TEXTURE_2D);
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
// draw world
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_NORMAL_ARRAY);
glEnableClientState(GL_COLOR_ARRAY);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glVertexPointer(3, GL_FLOAT, 0, renderState->collision.position);
glNormalPointer(GL_FLOAT, 0, renderState->collision.normal);
glColorPointer(3, GL_FLOAT, 0, renderState->collision.color);
glTexCoordPointer(2, GL_FLOAT, 0, worldUv);
glBindTexture(GL_TEXTURE_2D, worldTexture);
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glDrawElements(GL_TRIANGLES, renderState->collision.num_vertices, GL_UNSIGNED_SHORT, renderState->collision.index);
// create lighting on the scene
@ -145,6 +202,7 @@ static void gl20_draw(RenderState *renderState, const vec3 camPos, const struct
glEnable(GL_LIGHT0);
// first, draw geometry without Mario's texture.
glBindTexture(GL_TEXTURE_2D, 0);
update_mario_mesh( &renderState->mario, marioGeo );
uint32_t triangleSize = renderState->mario.num_vertices;
@ -153,7 +211,6 @@ static void gl20_draw(RenderState *renderState, const vec3 camPos, const struct
// now disable the color array and enable the texture.
glDisableClientState(GL_COLOR_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, renderState->mario_texture);
glMatrixMode(GL_TEXTURE);
glLoadIdentity();